US47194A

US47194A - Improvement in apparatus for withdrawing tubes from wells

Info

Publication number: US47194A
Authority: US
Publication date: 1865-04-11
Anticipated expiration: 1882-04-11

Description

' UNITED STATES PATENT OFFICE.

WILLIAM H. DowNINe, or PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT IN APPARATUS FOR WITHDRAWING TUBES FROM WELLS.

Specification forming part of Letters Patent No. 47,194, dated April 1l, 1865.

To @ZZ whom. t may concern:

Be it known that I, WILLIAM H. DowNING, ofthe city and county of Philadelphia, in the State of Pennsylvania, have invented a new and useful Tube Catcher or Apparatus for withdrawing Tubes from Wells or Shafts; and I do hereby declare the following to be a full and exact description of the saine, reference being had to the accompanying drawings, making part of this specification, in which- Figure lis a vertical longitudinal section of my improved apparatus. Fig. 2 is a side elevation of the same.

Similar letters of reference indicate corresponding pa-rts in the two figures.

My invention relates to an apparatus whose parts may be named in the order of their importance, as follows: First, a pair of pivoted jaws or arms having sharp-edged projections, which are driven into the tubingon its inside, or caused to take iirm hold therein when the jaws are expanded., and which contract with the jaws, so as to release their hold upon the tubing and permit the apparatus to be withdrawn from the same g secondly, a pair of toggles or levers pivoted together at their centers and to the above-mentioned jaws at their lower ends, and caused to contract bythe elevation of an embracing-yoke, which is done by means of a cord or rope, and for the purpose of contracting the toggles and catching-jaws when the apparatus is to be withdrawn from the tubing, thirdly, a springend an accessory lever, both placed between the catching-jaws and acting to spread or expand them for the purpose of driving the edged projections into the tubing, this lever being provided with a cord which causes the edged projections to dig the deeper the harder it is pulled, fourthly, a cap fitting over the upper extremities of the jaws during the descent of the apparatus into the tubing and removed to permit the jaws l to be spread by means of a cord.

the well when the jaws are expanded after having been lowered into the tubing. C C are toggles or levers attached respectively at their lower ends to the jaws A A, and turning upon a pivot, c. The toggles C C are slotted at the point where the pivot c is inserted to allow them the vertical play rendered necessary by the expansion and contraction of the jaws A A. The upperends of the toggles C G are deflected so as to prevent the detachment of the embracing-yoke C', which, on being elevated by the cord D extending upward and out of the well, contracts the toggles() C,

and consequently the jaws A A, but the yoke j ends ot' the'jaws A A, to hohl them together during their descent into the tubing, as represented in Fig. 1. After the apparatus is lowered to the point where the jaws are to take hold ofthe tubing, the cap E is raised in order to release the jaws by means of the cord E. As soon as the jaws A A are thus released,`they are spread or expanded by the interposed spring F, which causes the projections a a to spread and take into the tub ing. It', from the weight of the tubingor other cause, the spring F should not prove strong enough to embed the projections a a' to the requisite extent to insure a firm hold, such as will allow the tubing to be withdrawn, then the lever G, which is pivoted to one of the jaws A, is raised by the cord G. By means ofthe lever G and cord G the jaws A A may be expanded with great force, the projections a a embedding themselves into the tubing the harder the cord E is pulled.

When the tubing has been taken hold of by the projections a a inthe manner described, the apparatus may be elevated by power applied to the shaft H, attached thereto.

lThe dimensions of the apparatus may of course be varied in conformity with the size of the tubing to be raised.

Having thus described my invention, the following is what I claim-,aspnew and desire to secure by Letters Patent: y

l. Thejaws or arms A A, having projections a a', and adapted to be opened or spread by the spring F and lever G, when lowered into the tubing of a Well for the purpose of takin g hold of and raising the same, substantially as herein set forth.

2. The combination ofthe toggles C C, yoke C', and cord D, for contracting the jaws A A when the apparatus is to be withdrawn from the tubing.

3. The detachable cap E, employed to retain the jaws A A in their closed position while the apparatus is being lowered into the tubing, substantially as described.

To the above specification of my improved tubeeoateher, I have signed my hand this 25th day of January, 1865.

. WM. H. DOWNING.

Witnesses:

EDWARD H. KNIGHT, ALEX. A. G. KLAUCKE.